Method of protecting metal and metal structures



Patented may 4, 192s.

' UNITED 4STATES JOSEPH SILRAUSS,y OF CHICAGO, ILLINOIS.

i v METHOD OF PROTECTING METAL AND METAL STRUCTURES.

Application aled 'may 5,

l T o all whom it may] concern:

Be it known that I, .IosErH B. S'rRAUss, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented a certain new and useful Improvement in Methods of Protecting Me'talVand Metal Structures, of which the following isa specification.

This invention relates to a method of protecting metal and metal structures and consists in providing a new and improved method of this description. 4Metal structures are subject to deterioration due to the o xida tion of the metal. It is customary to ap ly paint of some kind to prevent this, but t paint lasts onl a short time and must therefore be applie at comparatively short intervals and is exceedingly expensive, and if for any reason it is not applied at frequent intervals, the metal structure rapidly deteriorates. The present invention has for its object to provide a method of easily, quickly and cheaply applying a protecting coating to a metal structure either before or after the metal is in position, and which will last for a long period of time and protect the metal from deterioration;

IIn carrying out this method I first apply to the metal one heavy coat or more of paint completely covering the surface. I then apply an adhesive material, such as glue of some description. Finally I apply -a silica coating preferably sprayed 'in position, 'as by a current of air. .It may for example be applied'by means of a cement gun orl similar construction, or if desired it may be applied by impacting it either by hand or by mecha nism' against the surface containing 'the adhesive and paint. I may, for example, use powdered glass or pebblesor sand for this outer coating, and I may omit the glue sul? face and employ a paint containing a. percentage of glue. This material embeds itself in the glue and lpaint and completely protectsthe paint, W ich in turn protects the metal.

1922. Serial N0. 558,759.

Painting as uoiv done satisfactorily protects the metal as long as the coat of paint remains intact, but when under the action of weather, Wind, and rain the paint coat is ruptured or sca-les ott', its protective effect 1s destroyed. In this ne7 process thls 1s eliminated. The protecting coat may be easily,-

coatingA may be applied either before or kafter the metal is in position, p

' For purposes of illustrationIhave shown a cross-sectional view of a piece of'metal show-- ing one form in which thecoating is applied. In this drawing there is a piece of metal 1 provided with a coat of paint 2 and an adhesive 3, there being material 4 in a finely divided state embedded in the adhesive. This tinely divided material may be any suitable non-.oxidizing material such as silica.

I claim: f

l. The method of protecting metal and metal structures from deterioration which consists in applying paint and an adhesive to the surface ol the metal, and then applying nonoxidizing material in a finely divided state so` as `to cause it to be held in place by the adhesive to protect the paint.

2. The method of protecting metal and metal structures from deterioration which consists in applying a coat of paint to the metal, then applying an adhesive on the out side of said paint, and then applying nonoxidizing material in a finely divided state while the adhesive is in a. plastic condition so as to cause such finely divided material to be embedded in said adhesive to protect said paint.

Signed at Chicago county of Cook and State of Illinois, this 21 day of April 1922.

JOSEPH B. vsTRAUs's. 

